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                        请求Request
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                        管理器Manager
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                        <h1 id="&#x7BA1;&#x7406;&#x5668;manager">&#x7BA1;&#x7406;&#x5668;Manager</h1>
<p>&#x7BA1;&#x7406;&#x5668;&#x662F;Django&#x7684;&#x6A21;&#x578B;&#x8FDB;&#x884C;&#x6570;&#x636E;&#x5E93;&#x64CD;&#x4F5C;&#x7684;&#x63A5;&#x53E3;&#xFF0C;Django&#x5E94;&#x7528;&#x7684;&#x6BCF;&#x4E2A;&#x6A21;&#x578B;&#x7C7B;&#x90FD;&#x62E5;&#x6709;&#x81F3;&#x5C11;&#x4E00;&#x4E2A;&#x7BA1;&#x7406;&#x5668;&#x3002;</p>
<p>&#x6211;&#x4EEC;&#x5728;&#x901A;&#x8FC7;&#x6A21;&#x578B;&#x7C7B;&#x7684;<strong>objects</strong>&#x5C5E;&#x6027;&#x63D0;&#x4F9B;&#x7684;&#x65B9;&#x6CD5;&#x64CD;&#x4F5C;&#x6570;&#x636E;&#x5E93;&#x65F6;&#xFF0C;&#x5373;&#x662F;&#x5728;&#x4F7F;&#x7528;&#x4E00;&#x4E2A;&#x7BA1;&#x7406;&#x5668;&#x5BF9;&#x8C61;objects&#x3002;&#x5F53;&#x6CA1;&#x6709;&#x4E3A;&#x6A21;&#x578B;&#x7C7B;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;&#x65F6;&#xFF0C;Django&#x4F1A;&#x4E3A;&#x6BCF;&#x4E00;&#x4E2A;&#x6A21;&#x578B;&#x7C7B;&#x751F;&#x6210;&#x4E00;&#x4E2A;&#x540D;&#x4E3A;objects&#x7684;&#x7BA1;&#x7406;&#x5668;&#xFF0C;&#x5B83;&#x662F;<strong>models.Manager</strong>&#x7C7B;&#x7684;&#x5BF9;&#x8C61;&#x3002;</p>
<h3 id="&#x81EA;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;">&#x81EA;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;</h3>
<p>&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x81EA;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;&#xFF0C;&#x5E76;&#x5E94;&#x7528;&#x5230;&#x6211;&#x4EEC;&#x7684;&#x6A21;&#x578B;&#x7C7B;&#x4E0A;&#x3002;</p>
<p><strong>&#x6CE8;&#x610F;&#xFF1A;&#x4E00;&#x65E6;&#x4E3A;&#x6A21;&#x578B;&#x7C7B;&#x6307;&#x660E;&#x81EA;&#x5B9A;&#x4E49;&#x7684;&#x8FC7;&#x6EE4;&#x5668;&#x540E;&#xFF0C;Django&#x4E0D;&#x518D;&#x751F;&#x6210;&#x9ED8;&#x8BA4;&#x7BA1;&#x7406;&#x5BF9;&#x8C61;objects&#x3002;</strong></p>
<p>&#x81EA;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;&#x7C7B;&#x4E3B;&#x8981;&#x7528;&#x4E8E;&#x4E24;&#x79CD;&#x60C5;&#x51B5;&#xFF1A;</p>
<p><strong>1. &#x4FEE;&#x6539;&#x539F;&#x59CB;&#x67E5;&#x8BE2;&#x96C6;&#xFF0C;&#x91CD;&#x5199;all()&#x65B9;&#x6CD5;&#x3002;</strong></p>
<p>a&#xFF09;&#x6253;&#x5F00;booktest/models.py&#x6587;&#x4EF6;&#xFF0C;&#x5B9A;&#x4E49;&#x7C7B;BookInfoManager</p>
<pre><code class="lang-python"><span class="hljs-comment">#&#x56FE;&#x4E66;&#x7BA1;&#x7406;&#x5668;</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">BookInfoManager</span><span class="hljs-params">(models.Manager)</span>:</span>
    <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">all</span><span class="hljs-params">(self)</span>:</span>
        <span class="hljs-comment">#&#x9ED8;&#x8BA4;&#x67E5;&#x8BE2;&#x672A;&#x5220;&#x9664;&#x7684;&#x56FE;&#x4E66;&#x4FE1;&#x606F;</span>
        <span class="hljs-comment">#&#x8C03;&#x7528;&#x7236;&#x7C7B;&#x7684;&#x6210;&#x5458;&#x8BED;&#x6CD5;&#x4E3A;&#xFF1A;super().&#x65B9;&#x6CD5;&#x540D;</span>
        <span class="hljs-keyword">return</span> super().filter(is_delete=<span class="hljs-keyword">False</span>)
</code></pre>
<p>b&#xFF09;&#x5728;&#x6A21;&#x578B;&#x7C7B;BookInfo&#x4E2D;&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;</p>
<pre><code>class BookInfo(models.Model):
    ...
    books = BookInfoManager()
</code></pre><p>c&#xFF09;&#x4F7F;&#x7528;&#x65B9;&#x6CD5;</p>
<pre><code class="lang-python">BookInfo.books.all()
</code></pre>
<p><strong>2. &#x5728;&#x7BA1;&#x7406;&#x5668;&#x7C7B;&#x4E2D;&#x8865;&#x5145;&#x5B9A;&#x4E49;&#x65B0;&#x7684;&#x65B9;&#x6CD5;</strong></p>
<p>a&#xFF09;&#x6253;&#x5F00;booktest/models.py&#x6587;&#x4EF6;&#xFF0C;&#x5B9A;&#x4E49;&#x65B9;&#x6CD5;create&#x3002;</p>
<pre><code class="lang-python"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">BookInfoManager</span><span class="hljs-params">(models.Manager)</span>:</span>
    <span class="hljs-comment">#&#x521B;&#x5EFA;&#x6A21;&#x578B;&#x7C7B;&#xFF0C;&#x63A5;&#x6536;&#x53C2;&#x6570;&#x4E3A;&#x5C5E;&#x6027;&#x8D4B;&#x503C;</span>
    <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">create_book</span><span class="hljs-params">(self, title, pub_date)</span>:</span>
        <span class="hljs-comment">#&#x521B;&#x5EFA;&#x6A21;&#x578B;&#x7C7B;&#x5BF9;&#x8C61;self.model&#x53EF;&#x4EE5;&#x83B7;&#x5F97;&#x6A21;&#x578B;&#x7C7B;</span>
        book = self.model()
        book.btitle = title
        book.bpub_date = pub_date
        book.bread=<span class="hljs-number">0</span>
        book.bcommet=<span class="hljs-number">0</span>
        book.is_delete = <span class="hljs-keyword">False</span>
        <span class="hljs-comment"># &#x5C06;&#x6570;&#x636E;&#x63D2;&#x5165;&#x8FDB;&#x6570;&#x636E;&#x8868;</span>
        book.save()
        <span class="hljs-keyword">return</span> book
</code></pre>
<p>b&#xFF09;&#x4E3A;&#x6A21;&#x578B;&#x7C7B;BookInfo&#x5B9A;&#x4E49;&#x7BA1;&#x7406;&#x5668;books&#x8BED;&#x6CD5;&#x5982;&#x4E0B;</p>
<pre><code>class BookInfo(models.Model):
      ...
    books = BookInfoManager()
</code></pre><p>c&#xFF09;&#x8C03;&#x7528;&#x8BED;&#x6CD5;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code>book=BookInfo.books.create_book(&quot;abc&quot;,date(1980,1,1))
</code></pre>
                    
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